Smoke-consuming furnace



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H. B. GREVE. SMOKE GONSUMING FURNAGE.

No. 325,207. Patented Aug. 25, 1885.

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H. B. GREVE. A SMOKE CONSUMING FURNAGE. No. 325,207. Patented Aug. 25, 1885.

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HENRY B. GREVE, OF MILWAUKEE, WISCONSIN.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 325,207, dated August 25, 1885.

Application filed April 23, 1855. (No model.)

To all whom it may concern:

.Be it known that I, HENRY B. GREVE, of Milwaukee, in the county of Milwaukee, and inthe State of \Visconsin, have invented certain new and useful Improvements in Smoke- Cnisummg Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof'.

My invention relates to furnaces, and will be fully deseriled hereinafter.

In the drawings, Figure l is a side view of a furnace embodying my improvement, with part ofthe wall broken away. Fig. 2 is a vertical longitudinal section through the center ot' the same. Fig. 3 is a section on line .1i x, Fig. 2, and Fig. 4 is a section on line y y, Iig. 3.

A represents the walls of the furnace; B, the boiler, and C a steam pipe that leads from the dome into the smoke-stack C', through the flue-chamber, around the rear of the flues, and thence down into a chamber, D, where it 1s branched, as at a, a and Z1. Each of the branches et a extends into a tapered opening, .d,1n the wall d', and the branch b extends luto and through the open lower end of a iiue, E, which iiue extends up to a blower, E', which in turn is connected b v a tiue, E2, with the base of the smoke-stack C. The vbranch b of steam-pipe C has a nozzle, b', that points toward the center of chamber D. It also has a valve, f, that is controlled from the outside by a rod, j", and after it has passed through the wall of iiue E this branch terminates i-n a cock, b3, for draining the pipe when necessary. lhe chamber l) forms a smoke and gas reservoir, a-nd is connected with the smokestack C by a pipe, g, that leads out ofthe lower portion of chamber D and enters the smoke-stack above its damper. rlhe pipe g has a damper, g', which should be always kept partly open, so as to prevent too much smoke and gas from collecting in the cha-mber. To utilize the fresh, warm air from the front of tbe furnace, I provide a pipe, H, having an invertedfunnel-shaped mouth, It, atits lower end, while its upper end enters the smoke-stack below the damper thereof.

N is a man-hole.

The operation of my device is as follows: The tire is started in the grate K with the smokestack damper open and the damper E3 in pipe E2 closed, in which condition they remain until the ire has progressed sufficiently for the generation of steam, but as soon as sufficient steam has been generated to start the machinery, and thus operate the fan through the belt M, then the smoke-stack damper is closed and the cock c of pipe C is opened, as well as damper E3, and the result will be as follows: The smoke and other gaseous products of combustion will be drawn by the blower from the grate around through the spaces through the boiler-dues, into the lower portion of the smoke-stack, and thence through pipe E2, the blower-casing, and tlue E to the mixing-chamber D, when it is reheated and mingled with a jet of superheated steam from nozzle b, and is then drawn from the chamber D into the ash-pit D beneath the grate by jets of superheated steam from branches ay c.,

and thence by the draft from the blower E up through the tire, to mingle with the fresh air from pipe H and be again returned to chamber l), and thus all the combustible gases will be consumed, while the heavy non-combustible gases will escape or be drawn up through pipe g.

My device may be adapted to marine and other styles of boilers or furnaces without departing from the spirit of my invention.

I propose to give to pipe (l as many crooks and bends as possible, that it may take up the maximum amount of heat and more hi ghly superheat the steam that passes through it. To increase the draft in pipe g, I may extend a jet-pipe, g2, from the boiler into its upper end.

llaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a smoke consuming attachment for furnaces, a smoke-chamber situated near the tire-bed, in combination with a blower and` a flue connecting it with the combustionchamber and another .line connecting it with the smoke-chamber, substantially as set forth.

2. The combination, with a iiue leading into the smoke-stack, of another tlue leading' into a smoke chamber, an intermediate blower, a wall separating the smoke-chamber from the ash-pit, and passages connecting the smokechamber and ash-pit, as set forth.

3. rlhe combination, with the smoke-cham- IOO bel, blower, und its flues, of u steam pipe leading` from the top of the boiler into the smoke-stack and through Jche nest of flues und down into the smokeehamhe1, as set forth.

4. The combination7 with the smokeehamber and smoke-Stack, of a pipe, g, leading from the bottom of the smoke-chamber up into the smoke-stuck above its damper, as seb forth.

5. The combination, with chamber D, of Ipe g and a steamjet leading from the boiler into the upper end of pipe g.

(i. The combination, in :L furnace, of a. pipe, H, the blower and its flues, and the smokeehfnmber, as set forth.

In testimony that I claim the foregoing I. have hereunto Set; my hand, at Milwaukee, iu the county of' Milwaukee und Stato of Wiscousin, in the presence of two witnesses.

HENRY B. GREVE. W'itnesses:

S. S. SToU'l, H. J. FORSYTII. 

